What is the major risk associated with a pregnancy involving diamniotic-dichorionic twins?

• A. Gestational diabetes
• B. Preterm delivery
• C. Intrauterine growth restriction
• D. Hypertensive disorders

Answer: (B)

In pregnancies involving diamniotic-dichorionic twins, the major risk is preterm delivery. This is due to several factors that affect multiple pregnancies in general, such as increased uterine distension and hormonal changes. Multiple gestations have a higher prevalence of complications that can lead to early labor. While diamniotic-dichorionic twins have a lower risk of complications compared to monochorionic twins, they still face a significantly higher rate of preterm deliveries than singleton pregnancies.

The lower complication rate associated with diamniotic-dichorionic twins does not eliminate the risk of preterm delivery; factors such as cervical incompetence or increased uterine pressure can precipitate this outcome. It is important to monitor such pregnancies closely to manage and mitigate the risk of early birth effectively.